Dental Implants for Diabetics?

I recently had a diabetic patient come in for a dental implant consultation. I´m wondering if some of you can update me on the latest research concerning dental implant placement in diabetics. Some studies suggest that most diabetics who lack good glycemic control are unable to receive dental implants due to the implant’s inability to heal properly to the jaw bone. Others have stated categorically that diabetes is not a contraindication for dental implants. What has been your actual experience with dental implants in diabetics? What kind of precautions, if any, should I be taking? What about the healing time for these types of patients? Thanks very much for any insights you can provide.